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Finding the Fourth Proportional to 42,000.40, 62,914.20 and 21,235.60

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Solution

The fourth proportional to 42,000.40, 62,914.20 and 21,235.60 is: 31,809.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,000.40 : 62,914.20 = 21,235.60 : x
  2. Step 2: Convert to fraction form
    42,000.40/62,914.20 = 21,235.60/x
  3. Step 3: Cross multiply
    42,000.40x = 62,914.20 × 21,235.60
  4. Step 4: Simplify right side
    42,000.40x = 1,336,020,785.52
  5. Step 5: Solve for x
    x = 1,336,020,785.52/42,000.40
  6. Step 6: Final answer
    x = 31,809.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.